JP6163534B2 - Absorbent article and method for manufacturing absorbent article - Google Patents

Description

  The present invention relates to an absorbent article and a method for manufacturing the absorbent article.

Absorbent articles that absorb excreted fluid such as menstrual blood (for example, sanitary napkins) are known.
The absorbent article has a longitudinal direction, a width direction, and a thickness direction orthogonal to each other. Further, the absorbent article has an absorbent body mainly composed of liquid absorbent fibers between the top sheet and the back sheet. In such an absorbent article, a technology is disclosed in which a back sheet provided on the non-skin side of the absorbent body is formed of a nonwoven fabric to improve air permeability and flexibility (for example, Patent Document 1).

Japanese Patent No. 3851737

  In the absorbent article described in Patent Document 1, since the back sheet is a liquid-permeable nonwoven fabric, the liquid absorbed by the absorbent is prevented from passing through the back sheet and moving to the wearer's clothing side. Therefore, it is desirable to provide a non-liquid-permeable leakproof sheet between the absorber and the backsheet. However, as for the absorbent article of patent document 1, the back sheet is formed with the nonwoven fabric, and it is in the state where the surface was fluffy. When an adhesive for bonding the leak-proof sheet is provided on the surface of such a nonwoven fabric, the bonding force between the adhesive and the nonwoven fabric surface is weak, so when removing the absorbent article after use from the underwear, the nonwoven fabric The adhesive may be peeled off from the (back sheet), and the leak-proof sheet may be detached from the back sheet or the back sheet itself may be torn.

  Further, the non-skin side surface of the back sheet is provided with an anti-slip adhesive part for fixing the absorbent article to the wearer's underwear at the time of wearing. The adhesive and the nonwoven fabric that form this anti-slip adhesive part The bonding strength with the surface is also weakened. Therefore, when the absorbent article after use is removed from the underwear, the adhesive is easily peeled off from the back sheet, and so-called “glue residue” may be generated in which the adhesive remains on the underwear side.

  The present invention has been made in view of the problems as described above, and the object of the present invention is an adhesive for bonding a leak-proof sheet to a back sheet in an absorbent article having a back sheet made of nonwoven fabric. It is in suppressing that the adhesive agent which forms a slip prevention adhesion part peels off from a back sheet.

The main invention for achieving the above object has a longitudinal direction, a width direction, and a thickness direction intersecting each other, and is disposed on the non-skin side of the wearer of the absorbent body, which absorbs liquid. A backsheet made of a nonwoven fabric, the absorbent body, a leak-proof sheet provided between the backsheet, and a non-slip adhesive portion formed by an adhesive provided on the non-skin side surface of the backsheet; The backsheet has a compression region that is a region compressed in the thickness direction, and has a portion where the anti-slipping adhesive portion and the compression region overlap, The skin side surface of the back sheet has a leak-proof sheet adhesive part formed by an adhesive that joins the back sheet and the leak-proof sheet, and the compressed region and the leak-proof sheet adhesive part overlap each other have a, the compression territory It has a density has a high-density portion, and the density is lower than the high density portion lower density part, a absorbent article, characterized in that.

  Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, in an absorbent article having a back sheet made of non-woven fabric, the adhesive that joins the leak-proof sheet to the back sheet and the adhesive that forms the anti-slip adhesive portion are prevented from peeling off from the back sheet. be able to.

It is the schematic plan view which looked at the napkin 1 from the skin side of the thickness direction. It is the schematic plan view which looked at the napkin 1 from the non-skin side of the thickness direction. It is the schematic cross section represented about the AA cross section of FIG. 4A and 4B are diagrams for explaining the surface state of the nonwoven fabric before and after the compression treatment. 5A and 5B are diagrams for explaining a wettability test method. It is a table | surface showing the result of a wettability test. It is a table | surface showing the result of a surface test. FIG. 5 is a plan view for explaining the relationship between a slip prevention adhesive portion 130 and a compression region 200. 5 is a plan view for explaining the relationship between the leak-proof sheet 40 and the leak-proof sheet adhesion portion 140 and the main body compression region 201. FIG. It is a table | surface showing the result of a tension test. FIG. 10 is a diagram showing a modification of the main body compression area 201. It is a figure shown about the case where the high density part 201h and the low density part 201l are continuously arrange | positioned in the longitudinal direction in the compression area | region 200. FIG.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
An absorbent body that has a longitudinal direction, a width direction, and a thickness direction that intersect with each other and absorbs a liquid; a back sheet that is formed of a non-woven fabric disposed on a non-skin side of a wearer of the absorbent body; and the absorbent body An absorbent article comprising: a leak-proof sheet provided between the back sheet and an anti-slip adhesive portion formed by an adhesive provided on a non-skin side surface of the back sheet, The sheet has a compression region that is a region compressed in the thickness direction, and has a portion where the anti-slip adhesive portion and the compression region overlap, and the back sheet is provided on the skin side surface of the back sheet. An absorbent article having a leak-proof sheet adhesive portion formed by an adhesive that joins the leak-proof sheet and the compression region and the leak-proof sheet adhesive portion overlapping each other .

  According to such an absorbent article, in the compression region where the surface of the back sheet is formed smoothly, the adhesive force by the adhesive that forms the anti-slip adhesive portion is increased. Furthermore, the adhesive force by the adhesive agent which forms a leak-proof sheet adhesion part also becomes strong. Thereby, when removing the used absorbent article from the underwear, the back sheet and the leak-proof sheet are hardly peeled off, and the absorbent article (back sheet) is easily prevented from being torn. In addition, the adhesive at the anti-slipping adhesive portion is not easily peeled off from the back sheet, and adhesive residue is hardly generated.

  In such an absorbent article, the backsheet has a non-compressed region in a region other than a region where the compressed region is formed, and in the backsheet, the non-compressed region has the anti-slip adhesive portion. It is desirable that it overlaps with a non-arranged area.

  According to such an absorbent article, it has a non-compressed region on the backsheet in which the nonwoven fabric surface is kept soft compared to the compressed region, thereby ensuring a good touch on the non-skin side surface of the absorbent article. The Thereby, even when it is a case where a back sheet contacts a wearer's skin at the time of wear of an absorptive article, it can control that a touch gets worse.

  In such an absorbent article, it is desirable that the compressed region has a high density portion having a high density and a low density portion having a density lower than that of the high density portion.

  According to such an absorbent article, since the softness of the nonwoven fabric surface is easily maintained in the low density portion as compared with the high density portion, in the compression region and the anti-slip adhesive portion overlapping the compression region. A certain degree of softness and texture can be maintained.

  In such an absorbent article, in the compression region, a plurality of the high-density portions having a predetermined length in the width direction are intermittently arranged in the longitudinal direction, and two adjacent in the longitudinal direction It is desirable that low density portions having a predetermined length in the width direction are arranged between the high density portions.

  According to such an absorbent article, when the absorbent article is pulled along the longitudinal direction in the operation of peeling off the absorbent article after use, even if the adhesive peels off at the low density portion, Propagation of the peeling of the adhesive in the longitudinal direction is suppressed by the high density portion adjacent to the low density portion in the longitudinal direction. That is, it becomes easy to suppress that an adhesive peels continuously along a longitudinal direction.

  In this absorbent article, it is preferable that the length of the high-density portion in the longitudinal direction is longer than the length of the low-density portion in the longitudinal direction.

  According to such an absorbent article, since the proportion of the area of the high density portion in the compressed region is larger than the proportion of the area of the low density portion, a smooth region is increased on the surface of the backsheet, and the adhesive Adhesive strength can be increased.

  In such an absorbent article, it is desirable that the contact angle of water in the compression region is 100 degrees or more and 120 degrees or less.

  According to such an absorbent article, since the wettability in the compression region of the back sheet is high and the surface is smooth, the adhesive force of the adhesive can be sufficiently increased. Therefore, if the contact angle of water in the compression region is in the range of 100 degrees or more and 120 degrees or less, the adhesive can be made more difficult to peel off.

  In such an absorbent article, when the portion where the compression region is formed in the backsheet is stretched, the length of the backsheet after stretching is equal to the length of the backsheet before stretching. It is desirable that the tensile stress when it becomes 105% is 6N or more.

  According to such an absorbent article, the absorbent article after use is pulled from the underwear by forming the compression region 200 so that the tensile stress when the backsheet made of nonwoven fabric is stretched by 5% is 6 N or more. It becomes easy to suppress that the back sheet itself is torn during the peeling operation.

  In this absorbent article, it is desirable that both outer ends in the width direction of the leak-proof sheet are located on the outer side in the width direction than both outer ends in the width direction of the absorber.

  According to such an absorbent article, since the non-liquid-permeable leak-proof sheet disposed between the back sheet and the absorber is wider than the absorber, moisture such as blood drainage absorbed by the absorber Can be easily prevented from moving to the non-skin side backsheet. Thereby, it can suppress that a wearer's clothes etc. get wet and become dirty.

  This absorbent article has wing portions that extend outward from both sides in the width direction of the absorbent body, and both outer ends in the width direction of the leak-proof sheet are worn by the absorbent article. Sometimes, it is desirable that the wing portion is inside the width direction with respect to a bending reference line that is a reference when the wing portion is bent in the width direction.

  According to such an absorbent article, when the wing portion is bent at the bending reference line, the leakage preventing sheet made of a hard material compared to the nonwoven fabric is suppressed from being bent together with the wing portion. . Thereby, even if the site | part of the bending reference line of a wing part contacts a wearer's leg part, it can suppress giving a wearer a hard feeling and producing a sense of incongruity.

  In such an absorbent article, it is desirable that a range in which the compression region is provided in the back sheet is narrower than the leak-proof sheet and wider than the slip prevention adhesive portion.

  According to such an absorbent article, a soft area | region can be enlarged in the non-skin side surface of a back sheet | seat by forming a compression area | region small so that it may become narrower than a leak-proof sheet. Then, by forming the compression region so as to be wider than the anti-slipping adhesive part, the adhesive of the anti-slipping adhesive part can be made difficult to peel off from the back sheet. In addition, since the leak-proof sheet adhesive part and the anti-slip adhesive part (main body anti-slip part) overlap with each other across the main body compression region in the thickness direction, it is difficult to generate adhesive residue at the anti-slip adhesive part, It becomes easy to suppress peeling of the leak-proof sheet bonding portion.

  In such an absorbent article, it is desirable that a range in which the compression region is provided in the back sheet is narrower than that of the absorbent body.

  According to such an absorbent article, when the absorbent article is worn, the absorbent body is always disposed between the wearer's skin and the compression region. Thereby, an absorber acts like a cushion and can make a wearer hard to feel the hardness of a compression field.

  In such an absorbent article, it is desirable that the adhesive is intermittently provided in the leak-proof sheet bonding portion.

  According to such an absorbent article, the leakage preventing sheet and the back sheet are suppressed while preventing the air permeability of the leakage preventing sheet from deteriorating due to the adhesive being applied over the entire surface of the leakage preventing sheet. The minimum necessary adhesive strength can be ensured between the two.

  Further, in a predetermined region of the backsheet made of non-woven fabric, a compression treatment is performed in the thickness direction to form a compression region, and an adhesive is provided on the non-skin side surface of the backsheet, and the compression region and Forming an anti-slip adhesive portion having an overlapping portion; providing an adhesive on the skin side surface of the backsheet to form a leak-proof sheet adhesive portion having an overlapping portion with the compression region; Bonding a leak-proof sheet to the non-skin side of the absorber that absorbs liquid, and bonding the leak-proof sheet to the skin side of the back sheet via the leak-proof sheet bonding portion. The manufacturing method of an absorbent article becomes clear.

  According to such a method for manufacturing an absorbent article, it is possible to increase the adhesive force due to the adhesive that forms the anti-displacement adhesive portion in the compression region where the surface of the backsheet is formed smoothly. Furthermore, the adhesive force by the adhesive agent which forms a leak-proof sheet adhesion part can also be strengthened. Thereby, when removing the used absorbent article from the underwear, the absorbent article can prevent the back sheet and the leak-proof sheet from being peeled off and the absorbent article (back sheet) is torn. Can be manufactured.

=== Embodiment ===
<Basic configuration of sanitary napkin>
A sanitary napkin 1 (hereinafter also simply referred to as napkin 1) will be described as an example of the absorbent article according to the present embodiment. In the following description, a sanitary napkin will be described as an example of the absorbent article. However, the absorbent article of the present embodiment also includes a so-called cage sheet (for example, a panty liner) and the like. It is not limited.

  FIG. 1 is a schematic plan view of the napkin 1 viewed from the skin side in the thickness direction. FIG. 2 is a schematic plan view of the napkin 1 viewed from the non-skin side in the thickness direction. FIG. 3 is a schematic cross section of the AA cross section of FIG. In the following description, each direction is defined as shown in FIGS. That is, the “longitudinal direction” along the product longitudinal direction of the napkin 1, the “width direction” orthogonal to the longitudinal direction along the product short direction of the napkin 1, and the “thickness” orthogonal to the longitudinal direction and the width direction, respectively. Direction ". The longitudinal direction has a “front side” that is a direction on the stomach side of the user when the napkin 1 is used, and a “rear side” that is a direction on the back side of the user. The thickness direction is the “skin side” that is the side (upper side in FIG. 3) that contacts the wearer's skin when the napkin 1 is worn, and the “non-skin side” that is the opposite side (lower side in FIG. 3). Have

  The napkin 1 includes an absorbent body 10 that absorbs liquid, a top sheet 20 that is disposed on the skin side of the wearer of the absorbent body 10, and a back sheet 30 that is disposed on the non-skin side of the wearer of the absorbent body 10; It has a leak-proof sheet 40 disposed between the absorbent body 10 and the back sheet 30, and a side flap 50 provided on the outer side in the width direction of the absorbent body 10. These members are joined to each other by a member adjacent in the thickness direction and an adhesive such as a hot melt adhesive HMA (see FIG. 3).

  The absorbent body 10 is a vertically long member extending in the longitudinal direction, and includes hydrophilic fibers, pulp, and the like, and can efficiently absorb and retain fluids such as body fluids and blood drainage. The absorbent body 10 is formed, for example, by laminating hydrophilic fibers or powders by the airlaid method.

  The top sheet 20 is a liquid-permeable sheet member that allows liquid such as body fluid to permeate, and is formed of, for example, a nonwoven fabric. However, a member other than a non-woven fabric may be used as long as it is a sheet member having a structure that allows liquid to pass through and is a safe member when contacting the user's skin when the napkin 1 is used. For example, a woven fabric or a mesh sheet may be used. The top sheet 20 is larger than the absorbent body 10 in the longitudinal direction and the width direction, and can cover the entire region of the absorbent body 10. Further, a second sheet 22 made of a member equivalent to the top sheet 20 is provided between the top sheet 20 and the absorbent body 10 in the thickness direction. However, the second sheet 22 is not necessarily provided.

  Further, side sheets 25 projecting outward in the width direction are joined to both sides in the width direction of the top sheet 20, and side flaps 50 described later are formed by the side sheets 25. In addition, the side flap 50 may be formed by extending a part of the top sheet 20 to the outside in the width direction of the absorbent body 10 instead of using the side sheet 25 as a member different from the top sheet 20. . Therefore, in this specification, the side sheet 25 is also treated as a part of the top sheet 20.

  The back sheet 30 is a sheet member made of a non-woven fabric, and is a member arranged on the non-skin side most in the napkin 1 (see FIG. 3). The back sheet in the conventional napkin is often formed of a liquid-impermeable film or the like, but in the napkin 1 of the present embodiment, the back sheet 30 is formed of a non-woven fabric, so it is compared with the conventional napkin. And breathability and flexibility are improved. In the present embodiment, the back sheet 30 is formed of, for example, an SMS (spunbond / meltblown / spunbond) nonwoven fabric. The SMS nonwoven fabric includes a meltblown layer having more fibers than other dry nonwoven fabrics and spunbond layers in the same basis weight comparison. Therefore, the formation is stable, even if the basis weight is low, the area of the portion where no fiber is present becomes smaller, and the adhesion area increases. That is, since the number of fibers contained per unit volume is large, the effect of the compression treatment described later is more likely to appear as compared with other nonwoven fabrics such as an air-through nonwoven fabric, which is suitable for this embodiment. A part of the back sheet 30 extends to the outside in the width direction of the absorbent body 10 to form a side flap 50 described later together with the side sheet 25.

  In a partial region of the backsheet 30, a compression region 200 is formed by performing compression processing in the thickness direction. In addition, a non-slipping adhesive portion 130 is formed in a predetermined region on the non-skin side surface of the back sheet 30 by providing an adhesive such as a hot melt adhesive (HMA). As shown in FIG. 2, the slip prevention adhesive portion 130 includes a belt-like body slip stopper 131 formed along the longitudinal direction at the center portion in the width direction of the back sheet 30 and a wing portion slip formed on the side flap 50. It has a stop 135 and a hip flap part displacement stop 136. These slip prevention adhesive portions 130 are affixed to the wearer's underwear when the napkin 1 is worn so that the position of the napkin 1 does not shift. In addition, when the napkin 1 is not used, the slip prevention adhesive portion 130 is covered with a protective sheet (not shown). In the state covered with such a protective sheet, the tackiness of the anti-slip adhesive portion 130 does not appear. Details of the compression region 200 and the anti-displacement bonding portion 130 will be described later.

  As shown in FIG. 3, the leak-proof sheet 40 is a non-liquid bonded to the non-skin side surface of the absorbent body 10 and the skin side surface of the back sheet 30 by an adhesive such as a hot melt adhesive (HMA). It is a permeable sheet member. In the present embodiment, the leak-proof sheet 40 is formed of, for example, a film mainly composed of polyethylene, propylene, or the like, a breathable resin film, or the like. Since the leak-proof sheet 40 is non-liquid permeable, the liquid that permeates the top sheet 20 and is absorbed by the absorbent body 10 when using the napkin 1 oozes out to the clothing side (non-skin side) such as underwear. Is suppressed.

  In the napkin 1, the back sheet 30 and the leak-proof sheet 40 are joined via a leak-proof sheet bonding portion 140 formed by an adhesive provided on the skin side surface of the back sheet 30 (see FIG. 3). Details of the arrangement and the like of the leak-proof sheet bonding portion 140 will be described later.

  The side flaps 50 are formed by laminating side sheets 25 (top sheets 20) and back sheets 30 extending outward from both sides in the width direction of the absorbent body 10 and bonding them together in the thickness direction (see FIG. 1, see FIG.

  As shown in FIG. 1, the side flap 50 of the present embodiment includes a wing portion 55 extending outward in the width direction from a region closer to the front side than the longitudinal center of the absorbent body 10, and more than the wing portion 55. A hip flap portion 56 extending outward in the width direction from the region on the rear side in the longitudinal direction.

  The wing portion 55 is bent to the non-skin side when the napkin 1 is worn, and the wing portion detent 135 is attached to the crotch portion of the wearer's underwear, thereby causing the napkin 1 to be displaced at the wearer's crotch portion. Make it harder. In the present embodiment, the wing portion 55 is formed in a region between the front wing base portion 55f and the rear wing base portion 55b in the longitudinal direction. This region is also a region in contact with the user's crotch (vaginal opening) when the napkin 1 is worn.

  The longitudinal direction position of the front wing base 55f is defined as follows. That is, when the distance in the width direction from the outer edge to the outer edge on both ends in the width direction of the napkin 1 is the width W55, the napkin 1 moves to the front side along the outer edge of the wing part 55 from the longitudinal center position of the wing part detent stop 135. In this case, in the longitudinal direction, the position where the width W55 starts to increase from the decrease is defined as the front wing base 55f. The distance between the front wing bases 55f provided on both sides in the width direction is defined as a front wing base width W55f. In FIG. 1, the front wing base width W55f is the shortest in the region on the front side of the center position in the longitudinal direction of the wing portion misalignment stop 135.

  Similarly, when moving from the center position in the longitudinal direction of the wing part displacement stopper 135 to the rear side along the outer edge of the wing part 55, the position where the width W55 starts to decrease from the decrease in the longitudinal direction is referred to as the rear wing base part 55b. To do. The distance between the rear wing bases 55b provided on both sides in the width direction is defined as a rear wing base width W55b. In FIG. 1, the rear wing base width W55b is the shortest in the region behind the center position in the longitudinal direction of the wing portion misalignment stop 135.

  In addition, when the napkin 1 is worn, the wing portion 55 passes through a base portion having a shorter width W55 (W55f or W55b) among the front wing base portion 55f and the rear wing base portion 55b, and a straight line along the longitudinal direction is a reference for bending. It is bent as a line. In the case of FIG. 1, since the width W55f of the front wing base 55f is shorter than the width W55b of the rear wing base 55b (W55f <W55b), a straight line along the longitudinal direction through the front wing base 55f Is the bending reference line FLW.

  The hip flap portion 56 is provided to extend outward in the width direction on the rear side (back side) in the longitudinal direction of the napkin 1, and when the napkin 1 is worn, the hip flap portion 56 is expanded in the width direction as shown in FIG. It is affixed to the buttocks region of the wearer's underwear by the misalignment stop 136. Thereby, a wearer's buttocks area | region is widely covered with the hip flap part 56. FIG. For example, even when blood drainage or the like wraps around the buttocks side while the wearer is lying on his / her back, the hip flap portion 56 covers the buttocks over a wide area. It becomes difficult to leak to the outer side of 1, and it can suppress that a wearer's underwear gets dirty.

  Moreover, as shown in FIG.1 and FIG.3, the several pressing part is formed in the skin side surface of the napkin 1, Thereby, the top sheet 20 (and second sheet | seat 22) and the absorber 10 are thick together. It is squeezed in the vertical direction and joined and integrated. In the top sheet 20 of this embodiment, the linear pressing part EL20 is formed as this pressing part. A plurality of linear compressed portions EL20 are formed so as to extend along the outer peripheral edge portion of the absorbent body 10, thereby forming a substantially annular shape that is long in the longitudinal direction as a whole. Moreover, other pressing parts other than the linear pressing part EL20 as shown in FIG. 1 may be formed. For example, a plurality of point-like compressed parts may be provided on the surface of the top sheet 20.

  Further, in the napkin 1, the top sheet 20 (and the side sheet 25) and the back sheet 30 have the same planar shape, and as shown in FIGS. 1 and 2, at least one of the outer peripheral edges of these sheets. The round seal 70 is formed by joining the area | region of a part using means, such as welding. However, in the present embodiment, the round seal 70 is not an essential component, and the top sheet 20 and the back sheet 30 may be joined by other means.

<About the compression area 200>
The compression area | region 200 formed in the back seat | sheet 30 of the napkin 1 is demonstrated. 4A and 4B are diagrams for explaining the surface state of the nonwoven fabric before and after the compression treatment.

  FIG. 4A schematically shows a surface state of a general nonwoven fabric not subjected to compression treatment. As described above, the back sheet 30 of the present embodiment is formed of a nonwoven fabric. Further, on the non-skin surface side of the back sheet 30, an anti-slip adhesive part 130 (main body anti-slip 131, wing part anti-skid 135, hip flap part anti-skid 136) is formed, and on the skin side of the back sheet 30 A leak-proof sheet bonding portion 140 is formed. That is, an adhesive is provided on the surface of the nonwoven fabric. In general, the surface of a nonwoven fabric has fine irregularities formed by a complex entanglement of a plurality of fibers, and the surface is rough when viewed microscopically. When an adhesive is provided on such a surface, the area (contact area) where the adhesive and the nonwoven fabric surface are in contact with each other as shown in FIG. 4A is reduced, and the adhesive (adhesive portion) is applied to the nonwoven fabric surface. There is a problem in that it is not sufficiently fixed and easily peels off.

  For example, in the napkin 1, when the slip prevention adhesive portion 130 is easily peeled off, the adhesive is peeled off from the back sheet 30 and remains on the underwear side when the slip prevention adhesive portion 130 is peeled from the underwear after the napkin 1 is used. There is a risk of “glue residue”. Further, in the napkin 1, if the leak-proof sheet bonding portion 140 is easily peeled off, the leak-proof sheet bonding portion 140 is peeled off when the napkin 1 is peeled from the underwear after the napkin 1 is used, and the leak-proof sheet 40 is removed from the back sheet 30. The napkin 1 may be torn off.

  Therefore, in the present embodiment, a compression region 200 is formed by performing a compression process on a predetermined region of the backsheet 30 made of a nonwoven fabric so that the adhesive is difficult to peel off in the compression region 200. FIG. 4B is a diagram schematically illustrating the surface state of the nonwoven fabric subjected to the compression treatment. In FIG. 4B, the fibers are pressed and compacted by the compression treatment, so that fine irregularities on the nonwoven fabric surface are reduced and the surface is in a smooth state. When an adhesive is provided on such a surface, the area (contact area) of the portion where the adhesive and the nonwoven fabric surface are in contact with each other is increased, and the adhesive force by the adhesive is increased compared to the case of FIG. 4A. be able to.

  The compression process is formed by applying a known pressure process such as a calendar process or an emboss process to a predetermined area of the backsheet 30. Moreover, in the napkin 1, the density of the compression area | region 200 formed by performing a compression process does not need to be uniform. That is, a high-density portion having a high density and a low-density portion having a density lower than that of the high-density portion may be formed inside the compressed region 200. In this specification, the whole area (including the high-density part and the low-density part) subjected to the compression process in this way is defined as a compressed area, and the area not subjected to the compression process is defined as an uncompressed area. In the non-compressed region, the nonwoven fabric has a surface state as shown in FIG. 4A, and the surface is softer and softer than the compressed region 200.

  Then, the surface characteristic of the compression area | region 200 formed in the back seat | sheet 30 is demonstrated concretely. In the present embodiment, “wetting” is used as an index representing the smoothness of the surface of the compression region 200. It can be said that the lower the wettability, the higher the water repellency and the smoother the surface of the compression region 200. The degree of wettability of the compression region 200 is measured by performing a wettability test.

  5A and 5B are diagrams for explaining a wettability test method. In the wettability test, first, as shown in FIG. 5A, water droplets having a predetermined size (for example, diameter D) are formed (for example, water is ejected by a certain amount from a syringe nozzle to form water droplets), and On the other hand, the material (nonwoven fabric) provided on the stage arranged on the lower side is moved vertically upward to bring the material into contact with water droplets. Then, as shown in FIG. 5B, the contact angle of the water droplet is measured in a state where the water droplet is in contact with the material. In the wettability test, multiple types of materials subjected to compression treatment while changing conditions such as pressure during compression treatment (0, 10, 20, 30 kg / cm2), heating temperature and conveyance speed during compression treatment, etc. Then, each measurement is performed a plurality of times, and the average of the measured values of contact angle is obtained.

  FIG. 6 is a table showing the results of the wettability test. First, in the case of material No. 1 where the nonwoven fabric was not subjected to compression treatment (in the case of pressure 0 kg / cm 2), the contact angle could not be measured because water soaked into the nonwoven fabric surface. Under other conditions, contact angles of 97.42 to 125.48 degrees were measured. Furthermore, using the same kind of material as that used for the wettability test, an adhesive was applied to the surface, and a test was performed after peeling, to verify the adhesive strength. As a result, it was confirmed that the contact angle was 97.42 to 125.48 degrees, and had sufficient adhesive strength and the adhesive was difficult to peel off.

  Moreover, about the test piece of the material number 1 of FIG. 6, and the material number 4, the surface roughness was measured using the "KES-FB4 AUTO-A" automated surface test machine by Kato Tech Co., Ltd. The tester can perform a friction test on the surface of the material to be tested using a predetermined friction element (sensor) to measure the friction coefficient of the material surface, fluctuation of the friction coefficient, surface roughness, etc. . In this embodiment, a surface test is performed a plurality of times (three times for each test piece) under the condition that a static static load is 10 g weight using a 5 mm × 5 mm contact, and the surface roughness is measured. The average value was recorded. FIG. 7 is a table showing the results of the surface test. As shown in FIG. 7, the average surface roughness of the nonwoven fabric of material number 1 that was not subjected to compression treatment was 3.99 μm. On the other hand, the average of the surface roughness was 1.56 μm in the nonwoven fabric of material number 4 that was strongly compressed. Also from this data, it became numerically clear that the surface of the nonwoven fabric subjected to the compression treatment has higher smoothness than the nonwoven fabric not subjected to the compression treatment.

  Therefore, as a wettability index representing the smoothness of the surface of the compression region 200, if the contact angle of water with the compression region 200 is in the range of 100 to 120 degrees, the surface of the compression region 200 has sufficient smoothness. Will be doing. Thereby, the adhesive force of the slip prevention adhesive part 130 and the leak-proof sheet adhesive part 140 in the compression region 200 becomes strong, and it is possible to make it difficult to peel the adhesive from the back sheet 30.

<Relationship between Anti-Slip Adhering Portion 130 and Compression Region 200>
FIG. 8 is a plan view for explaining the relationship between the slip prevention adhesive portion 130 and the compression region 200. In the napkin 1, a main body compression region 201, a wing portion compression region 205, and a hip flap portion compression region 206 are formed as the compression region 200. As shown by the shaded display portion in FIG. 8, the main body compression region 201 is a rectangular region arranged along the vertical direction while having a predetermined width at the center in the width direction. A main body displacement stopper 131 is formed in the main body compression area 201. That is, the main body displacement stopper 131 is formed so as to overlap the main body compression region 201. As described above, since the main body compression region 201 (compression region 200) has high wettability and the surface of the nonwoven fabric is formed smoothly, the contact area between the surface of the nonwoven fabric and the adhesive is increased, and the adhesive force is increased. . Therefore, the adhesive forming the main body displacement stopper 131 is firmly bonded to the surface of the back sheet 30 (main body compression region 201) and is difficult to peel off. Thereby, when the napkin 1 after use is removed from the underwear, it is possible to effectively suppress “glue residue” in which the adhesive forming the main body displacement stopper 131 remains on the underwear side.

  The wing portion compression region 205 is a rectangular region formed in the wing portion 55. In the area of the wing portion compression region 205, a wing portion misalignment stop 135 is formed. That is, the wing part displacement stopper 135 is formed so as to overlap the wing part compression region 205. Similarly, the hip flap portion compression region 206 is a rectangular region formed in the hip flap portion 56. Further, a hip flap portion displacement stopper 136 is formed in the hip flap portion compression region 206. That is, the hip flap part displacement stopper 136 is formed so as to overlap the hip flap part compression region 206. As a result, the adhesive forming the wing portion displacement stopper 135 and the hip flap portion displacement stopper 136 is strongly bonded to the surface of the back sheet 30 and is difficult to peel off.

  In addition, the shape of the compression area | region 200 or the slip prevention adhesion part 130 is not restricted to the shape shown by FIG. For example, even when the compression region 200 and the anti-slipping adhesive portion 130 overlap only in a part of the region, the adhesive force of the adhesive can be increased in the overlapping region. The portion 130 can be made difficult to peel off from the back sheet 30.

  Further, the portion of the back sheet 30 where the compression region 200 is not formed is a non-compression region that has not been subjected to compression processing. That is, the back sheet 30 of the napkin 1 has a compression region 200 and a non-compression region. In this non-compressed region, since the nonwoven fabric surface is kept softer than the compressed region 200, even when the napkin 1 is worn, it is difficult to deteriorate the touch even when the napkin 1 is in contact with the wearer's skin. That is, the back sheet 30 of the napkin 1 ensures a good touch by having an uncompressed region.

  In FIG. 8, a region between the width direction of the main body compression region 201 and the wing portion compression region 205 is an uncompressed region. That is, the napkin 1 has an uncompressed region between the main body displacement stopper 131 and the wing portion displacement stopper 135. Specifically, a region where the bending reference line FLW of the wing portion 55 is provided is an uncompressed region. When the napkin 1 is worn, the wing portion 55 is bent at the bending reference line FLW. Therefore, if the bending reference line FLW is formed in a soft non-compressed region as compared with the compressed region 200, the wing portion 55 is easily bent. The wearing operation of the napkin 1 can be performed easily. Moreover, when the napkin 1 is worn, the position of the bending reference line FLW is a portion that is highly likely to come into direct contact with both legs of the wearer. Is less likely to cause discomfort.

  Further, as shown in FIG. 8, in the napkin 1, outer edges (edges) at both ends in the width direction of the absorbent body 10 are non-compressed regions. The width direction both ends edge of the absorber 10 is a part pinched | interposed into an inguinal part when the napkin 1 is worn. That is, it is a part strongly pressed against the wearer's groin. Therefore, if the portions of the outer edge 10e at both ends in the width direction of the absorbent body 10 overlap with the compression region 200, the nonwoven fabric whose surface is hardened by the compression process is pressed against the groin of the wearer, causing discomfort. It becomes easy. On the other hand, in the napkin 1, since the part of the outer edge 10e of the width direction both ends of the absorber 10 has overlapped with the soft non-compression area | region, the touch in a wearer's groin part can be made favorable.

  Moreover, the compression area | region 200 is formed so that it may not overlap with the outer periphery (edge) of the napkin 1. FIG. That is, the outer peripheral edge of the napkin 1 is an uncompressed region. In the longitudinal direction, the main body compression region 201 is arranged so as not to cover the outer peripheral edge of the napkin 1. When the surface of the nonwoven fabric is hard at both longitudinal edges of the napkin 1, the edges are likely to bite into the wearer's abdomen and back (hip) when the napkin 1 is worn, which may cause discomfort to the wearer. . Therefore, by making the edge an uncompressed region, flexibility is secured and it is difficult for the wearer to feel uncomfortable. Of course, the wing compression area 205 and the hip flap compression area 206 also do not overlap with the outer peripheral edge of the napkin 1 in the vertical direction. Similarly, in the lateral direction, the wing compression region 205 and the hip flap compression region 206 are arranged so as not to overlap with the outer peripheral edge of the napkin 1. The edges of the wing portion 55 and the hip flap portion 56 are portions that come into contact with the wearer's legs and buttocks when the napkin 1 is worn. This makes it difficult for the wearer to feel uncomfortable.

  Further, in the napkin 1, the compression region 200 is formed so as not to overlap with the round seal 70 of the napkin 1. The round seal 70 is a region having a predetermined width along the outer peripheral edge of the napkin 1, and the top sheet 20 (side sheet 25) and the back sheet 30 are joined in the region. Therefore, if the surface of the back sheet 30 (that is, the surface in contact with the wearer's skin) is hard in this region, the wearer can easily feel the tightness of the round seal 70, and the feeling of strangeness when wearing the napkin 1 is large. There is a risk. Therefore, by setting the round seal 70 as a non-compressed region, the flexibility of the nonwoven fabric surface is ensured, and the uncomfortable feeling when wearing the napkin 1 is made difficult to occur. In addition, if the compression region 200 is arranged so as not to overlap with the round seal 70, the possibility that the compression region 200 overlaps with the outer peripheral edge (edge) of the napkin 1 can be further reduced.

<Relationship between leak-proof sheet 40 and leak-proof sheet bonding portion 140 and compression region 200>
FIG. 9 is a plan view for explaining the relationship between the leak-proof sheet 40 and the leak-proof sheet bonding portion 140 and the compression region 200 (main body compression region 201). As shown in FIG. 9, the leak-proof sheet bonding portion 140 (indicated by the hatched portion in FIG. 9) has a portion that overlaps with the main body compression region 201, and almost the entire region of the leak-proof sheet 40. It is formed over. As described above, since the surface of the nonwoven fabric is smooth in the main body compression region 201, the adhesive is firmly bonded in a region where the main body compression region 201 and the leak-proof sheet bonding portion 140 overlap and is difficult to peel off. Thereby, when removing the used napkin 1 from underwear, it becomes easy to suppress that the napkin 1 is torn by peeling off the leak-proof sheet 40 (leak-proof sheet adhesion part 140) from the back sheet 30.

  The leak-proof sheet bonding portion 140 is formed by applying an adhesive such as a hot melt adhesive (HMA) to the back sheet 30 with a Ω pattern, a spiral pattern, a coater having a pitch of about 1 mm, or the like. That is, in the leak-proof sheet bonding portion 140, the adhesive is not so-called solid coating, but is intermittently bonded to the base material (back sheet 30). As described above, the leak-proof sheet 40 is composed of a breathable film. However, if the adhesive is solid-coated in the leak-proof sheet bonding portion 140, the breathability deteriorates, and the napkin 1 Steaming easily occurs when worn. Therefore, by providing an adhesive intermittently, air permeability is not impaired while ensuring the minimum necessary adhesive force.

  In the present embodiment, the backsheet 30 itself is not easily torn by applying a compression process to the backsheet 30 to form the compression region 200. That is, by setting the tensile strength of the nonwoven fabric in the compression region 200 to a predetermined strength or more, the nonwoven fabric is hardly broken. The tensile strength of the nonwoven fabric can be measured by conducting the following tensile strength test. First, a plurality of test pieces (for example, 10 pieces) obtained by cutting a material to be measured (back sheet 30 subjected to compression treatment) to about 10 mm × 10 mm are prepared, and a commercially available tensile tester is used for each test piece. Perform a tensile test. Specifically, each test piece is pulled until it reaches a predetermined elongation (for example, 3%, 5%, 10%, etc.), and the tensile force at that time is measured to calculate an average value. The material to be measured is a non-compressed non-woven fabric, and the compression pressure is changed stepwise (for example, 10 (weak), 20 (medium), 30 (strong) kg / cm2). Are three types of nonwoven fabric.

  FIG. 10 is a table showing the results of the tensile test. FIG. 10 shows the measurement results of the tensile strength when the test piece was extended by 5%. In addition, in the operation | movement which peels off the napkin 1 from underwear, since the maximum elongation degree of a nonwoven fabric is 5% or less, the tensile strength at the time of 5% expansion | extension can be made into the maximum intensity | strength requested | required of the back seat | sheet 30. As a result of the measurement, the non-compressed nonwoven fabric (material No. 1) had a strength at 5% elongation of 5.579N. On the other hand, all of the nonwoven fabrics subjected to the compression treatment while changing the pressure condition during the compression treatment in the range of 10 to 30 (kg / cm 2) had a strength at 5% elongation higher than 5.579N. That is, it was confirmed that the strength of the back sheet 30 itself was increased by forming the compression region 200. This is because the fiber density constituting the nonwoven fabric is increased by the compression treatment, and the bonding point between the fibers is increased by increasing the fusion point between the fibers. Therefore, in the backsheet 30 of the present embodiment, the compression region 200 is formed such that the tensile stress when the nonwoven fabric is stretched by 5% is 6N or more. Thereby, it becomes easy to suppress that the back sheet 30 itself is torn when the napkin 1 is peeled off from the underwear.

  Moreover, in the napkin 1 of this embodiment, the length of the leakproof sheet 40 in the width direction is longer than the length of the absorbent body 10 in the width direction. In other words, both ends of the leak-proof sheet 40 in the width direction are outside of the width direction of both ends 10e of the absorber 10 in the width direction. By making the leak-proof sheet 40 wider than the absorbent body 10, it becomes easy to suppress movement of moisture such as blood drainage absorbed by the absorbent body 10 to the back sheet 30 on the non-skin side.

  Furthermore, both ends 40 e in the width direction of the leak-proof sheet 40 are inside the width direction with respect to the bending reference line FLW of the wing portion 55. Thereby, when the wing part 55 is bent by the bending reference line FLW in order to fix the napkin 1 to underwear, it is suppressed that the leak-proof sheet 40 is bent together with the wing part 55. Since the leak-proof sheet 40 is made of a material that is harder than that of the nonwoven fabric, if the leak-proof sheet 40 is disposed so as to overlap the position of the folding reference line FLW of the wing portion 55, the folding reference line FLW May come into contact with the legs of the wearer and give the wearer a firm feel and a sense of discomfort. On the other hand, in this embodiment, since the leak-proof sheet 40 is arrange | positioned inside the width direction rather than the bending reference line FLW, it is hard to give a wearer a discomfort.

  Further, in the napkin 1, the main body compression area 201 is provided so as to be narrower than the leak-proof sheet 40 and wider than the main body displacement stopper 131 (see FIGS. 8 and 9). Since the non-skin side surface of the backsheet 30 may be in direct contact with the wearer's skin, the region where the main body compression region 201 is formed is made as small as possible, and the surface of the nonwoven fabric (backsheet 30) in the region is reduced. It is desirable to keep the texture soft. In the present embodiment, the main body compression region 201 is narrower than the leak-proof sheet 40, so that the non-skin side surface of the back sheet 30 is kept as wide as possible and the main body displacement stopper 131. The adhesive of the main body misalignment 131 is made difficult to peel off from the back sheet 30. Further, with this configuration, the leak-proof sheet bonding portion 140 and the main body displacement stopper 131 overlap with each other across the main body compression region 201 in the thickness direction, and the respective adhesives are difficult to peel off. Therefore, in the region where the greatest force is applied in the operation of peeling the napkin 1 from the underwear after use, the leakproof sheet bonding portion 140 is peeled off and the napkin 1 is torn while making it difficult to generate adhesive residue of the main body displacement stopper 131. It can suppress efficiently.

  Furthermore, the main body compression region 201 is provided to be narrower than the absorbent body 10. Thereby, when the napkin 1 is worn, the absorbent body 10 is always disposed between the skin of the wearer and the main body compression region 201. In the main body compression region 201, the surface of the nonwoven fabric is hardened by the compression process, but the absorbent body 10 serves as a cushion to make the wearer less likely to feel the hardness of the main body compression region 201, so that the wearer does not feel uncomfortable. Become.

<Modification of compression area 200>
As a modified example of the compression region 200, an example in which a high-density portion having a high density and a low-density portion having a lower density than the high-density portion are formed in the main body compression region 201 will be described. FIG. 11 is a diagram illustrating a modified example of the main body compression area 201. In this modification, the main body compression region 201 has a high density portion 201h (shaded display portion in FIG. 11) and a low density portion 201l. The high density portion 201h is a rectangular region having a length W201h in the width direction and a length L201h in the longitudinal direction, and a plurality of high density portions 201h are intermittently arranged at predetermined intervals in the vertical direction. . And the low density part 201l is arrange | positioned between two adjacent high density parts 201h. That is, the main body compression region 201 is formed by alternately arranging the high density portions 201h and the low density portions 201l in the longitudinal direction.

  In the low density part 201l, the softness of the nonwoven fabric surface is easily maintained. Therefore, in the main body compression region 201 of the modification, the softness of the main body compression region 201 is provided by having the low density portion 201l as compared with the case where the entire high density portion 201h is formed by the high density portion 201h. It becomes easy to maintain. Even in the main body displacement stopper 131 formed to overlap with the main body compression region 201, a certain degree of softness and texture are ensured.

  Further, when the high-density portion 201h and the low-density portion 201l are provided in the main body compression region 201, the high-density portion 201h is intermittently disposed in the longitudinal direction, thereby peeling the used napkin 1 from the underwear. In addition, it is possible to make it difficult to peel off the adhesive of the main body displacement stopper 131. FIG. 12 is a diagram illustrating a case where the high density portion 201h and the low density portion 201l are continuously arranged in the longitudinal direction in the compression region 200. When peeling off the napkin 1, the napkin 1 is pulled along the longitudinal direction. At that time, if the low density portion 201l is continuously formed in the longitudinal direction as shown in FIG. 12, when the adhesive peels off in any of the low density portions 201l, the low density portion extended in the longitudinal direction. There is a possibility that the adhesive may be continuously peeled along 201l. For example, if the adhesive is peeled off at the point P in FIG. 12 when the napkin 1 is peeled off, the peeling of the adhesive tends to propagate in the longitudinal direction starting from the point P. In contrast, if the high density portion 201h and the low density portion 201l are formed in an intermittent stripe shape in the longitudinal direction as shown in FIG. 11, the adhesive is peeled off in any region of the low density portion 201l. Even if it occurs, it is possible to stop the peeling of the adhesive from propagating in the longitudinal direction at the high density portion 201h arranged adjacent to the low density portion 201l in the longitudinal direction. As described above, the high-density portion 201h (and the low-density portion 201l) is intermittently disposed with respect to the direction (longitudinal direction) in which the main body compression region 201 is peeled off, thereby preventing the adhesive from being continuously peeled off. Thus, the adhesive can be made difficult to peel off.

  In the napkin 1, the length L201h in the longitudinal direction of the high density portion 201h is formed to be longer than the length L201l in the longitudinal direction of the low density portion 201l (L201h> L201l). In 201, since the area of the high density part 201h becomes larger than the area of the low density part 201l, the part where the surface of the back sheet 30 (nonwoven fabric) becomes smooth becomes large, and the adhesive becomes more difficult to peel off.

  In the present embodiment, the distance between two high-density portions 201h adjacent in the longitudinal direction (that is, the length L201l in the longitudinal direction of the low-density portions 201l) is 3 mm or less. By setting the area between the high density parts 201h to a predetermined size (3 mm) or less, the area of the low density part 201l is limited, and therefore it is easy to suppress the adhesive from peeling off at the low density part. Become. Further, in the present embodiment, the main body displacement stopper 131 is formed as a region having a width of at least 3 mm in order to ensure a necessary minimum adhesive force. Therefore, if the distance between two high density portions 201h adjacent in the longitudinal direction is 3 mm or less, the main body displacement stopper 131 overlaps at least a part of the high density portion 201h. Thereby, an adhesive agent can be made harder to peel.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

  In the above-described embodiment, the absorbent article (the sanitary napkin 1) having the side flaps 50 has been described, but the side flaps 50 are not necessarily provided. For example, the absorbent article which is not provided with the wing part 55 and the hip flap part 56 may be sufficient.

1 sanitary napkins (napkins),
10 Absorber, 10e Both ends in the width direction,
20 top sheet, 22 second sheet, 25 side sheet,
30 Backsheet,
40 leakage prevention sheet, 40e width direction both ends 50 side flap, 51 reinforcing sheet,
55 Wing, 51f Front Wing Base, 51b Rear Wing Base,
56 Hip flap part,
70 round seal,
130 Anti-slip adhesive part,
131 Body stopper
135 Wing part stopper, 136 Hip flap part stopper,
140 Leakproof sheet adhesion part,
200 compression area,
201 main body compression region, 201h high density part, 201l low density part,
205 Wing compression area, 206 Hip flap compression area,
EL20 linear pressing part,
FLW bending reference line

Claims (12)

Having a longitudinal direction, a width direction and a thickness direction intersecting each other;
An absorber that absorbs the liquid;
A backsheet comprising a non-woven fabric disposed on the non-skin side of the wearer of the absorbent body;
A leak-proof sheet provided between the absorber and the back sheet;
A non-slip adhesive portion formed by an adhesive provided on the non-skin side surface of the back sheet,
An absorbent article comprising:
The backsheet has a compression region that is a region compressed in the thickness direction,
Having a portion where the anti-slip adhesive portion and the compression region overlap;
On the skin side surface of the backsheet, there is a leakproof sheet adhesive portion formed by an adhesive that joins the backsheet and the leakproof sheet,
Said compression region and the leakage preventing sheet bonding portion have a portion overlapping,
The said compression area | region has a high density part with a high density, and a low density part with a density lower than the said high density part, The absorbent article characterized by the above-mentioned. The absorbent article according to claim 1,
The backsheet has an uncompressed region in a region other than the region where the compressed region is formed,
The said back sheet WHEREIN: The said non-compressed area | region has overlapped with the area | region where the said slip prevention adhesion part is not arrange | positioned, The absorbent article characterized by the above-mentioned. The absorbent article according to claim 1 or 2 ,
In the compressed region,
A plurality of the high-density portions having a predetermined length in the width direction are intermittently disposed in the longitudinal direction;
Between the two high-density portions adjacent in the longitudinal direction, a low-density portion having a predetermined length in the width direction is disposed.
An absorbent article characterized by the above. The absorbent article according to claim 3 ,
The length of the high-density portion in the longitudinal direction is longer than the length of the low-density portion in the longitudinal direction. The absorbent article according to any one of claims 1 to 4 ,
The absorbent article, wherein a contact angle of water in the compression region is 100 degrees or more and 120 degrees or less. The absorbent article according to any one of claims 1 to 5 ,
In the backsheet, when the portion where the compression region is formed is expanded,
An absorbent article, wherein the tensile stress is 6 N or more when the length of the back sheet after stretching is 105% of the length of the back sheet before stretching. The absorbent article according to any one of claims 1 to 6 ,
Both the outer ends in the width direction of the leak-proof sheet are located on the outer side in the width direction with respect to both outer ends in the width direction of the absorbent body. The absorbent article according to claim 7 ,
Having a wing portion extending outward from both side portions of the absorbent body in the width direction;
Both outer ends of the leakproof sheet in the width direction are
The absorbent article, wherein the absorbent article is located on the inner side in the width direction with respect to a bending reference line that is a reference when the wing portion is folded in the width direction when the absorbent article is worn. An absorbent article according to any one of claims 1 to 8 ,
The range in which the compression area is provided in the back sheet is narrower than the leak-proof sheet and wider than the slip prevention adhesive portion. The absorbent article according to claim 9 ,
The range in which the said compression area | region is provided in the said back seat | sheet is narrower than the said absorber, The absorbent article characterized by the above-mentioned. It is an absorptive article in any one of Claims 1-10 ,
The absorbent article, wherein the adhesive is provided intermittently at the leak-proof sheet bonding portion. In a predetermined region of the backsheet made of non-woven fabric, forming a compression region by performing a compression treatment in the thickness direction;
Providing an adhesive on the non-skin side surface of the backsheet to form a slip-off adhesive portion having a portion overlapping with the compression region;
Providing an adhesive on the skin side surface of the backsheet to form a leak-proof sheet adhesion portion having a portion overlapping the compression region;
Bonding a leak-proof sheet to the non-skin side of the absorber that absorbs the liquid;
Bonding the leak-proof sheet to the skin side of the back sheet via the leak-proof sheet adhesive portion ,
The said compression area | region is an absorbent article manufacturing method provided with a high-density part with a high density, and a low-density part with a density lower than the said high-density part .